Year	thousand metric tons of CO2 equivalent
1990	47.5
1991	49.8
1992	55.8
1993	56
1994	55.5
1995	58.4
1996	57.3
1997	60.1
1998	64
1999	68.3
2000	68.2
2001	71.7
2002	66.9
2003	67.3
2004	65.1
2005	68.4
2006	69.8
2007	71.7
2008	75.7
2009	71.2
2010	68.5
2011	72
2012	69.5
2013	79.7
2014	88.1
2015	90.1
2016	88.5
2017	92.5
2018	98.1
2019	92.7
2020	82.5